Method for detecting particle size of silica powder

By using polyethylene glycol-based silane coupling agents to modify the surface of silicon micropowder, the accuracy problems of ultrasonic and external emulsification methods in the detection of small-particle-size silicon micropowder were solved, and more stable particle size detection results were achieved.

CN122084470APending Publication Date: 2026-05-26WANHUA CHEM GRP CO LTD +1
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Patent Information

Application Number
CN202411687426.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-25
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In existing technologies, the ultrasonic method and external emulsification method have poor accuracy in detecting the particle size of small-diameter silicon micropowder, making it difficult to obtain stable detection results.

Method used

Silane coupling agents containing polyethylene glycol segments were used to modify the surface of silicon micropowder. By chemically grafting long-chain hydrophilic segments, the dispersibility and stability of silicon micropowder in the dispersion were improved, and then the particle size was detected.

Benefits of technology

This improves the accuracy and stability of silicon micropowder particle size detection, reduces the dependence of detection results on sampling methods and ultrasonic conditions, and obtains more reliable particle size data.

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Abstract

The invention provides a particle size detection method of silica powder. The particle size detection method comprises the following steps: carrying out surface modification on the silica powder by adopting a silane coupling agent containing a polyethylene glycol chain segment, and carrying out particle size detection on the surface-modified silica powder. After the silane coupling agent containing the polyethylene glycol chain segment is adopted to perform surface modification on the silica powder, and a long-chain hydrophilic chain segment is chemically grafted on the surface of the silica powder, the silica powder obtains self-emulsifying dispersing capacity, and the dispersity and stability of the silica powder in dispersion liquid are greatly improved. Compared with an ultrasonic method, an external emulsification method and the like, the influence of external factors such as a sampling mode and an ultrasonic condition on the particle size detection result measured by the method is greatly reduced, and the test result is more accurate and stable.
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